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keep up保持 继续 维持 跟上(时代)
keepv.保持；保留；继续；贮藏；经营；遵守；供给；照管；饲养；耽搁；保持食物不变质；健康状况如何；保守（秘密@）；记录；遵守；保护n.生计；保存；城堡主楼；监狱；围墙
keep abreast of times赶上时代的发展
keep down one's anger捺住心头的怒火
keep ... at bayhold
keep sth. from rust使某物不生锈
keep on at one's work二硫化黄原酸二异丙酯
keep up one's courage烷基黄原酸盐
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